This guide will teach you how to sync Spotify music playlists with your smartphone so that you can listen to them when you're not connected to the internet. This simple trick will enable you to listen to your favorite songs offline with the Spotify app.
The first step is to connect to a WiFi network. This will allow you to avoid extra charges relating to the use your mobile data plan. But if you don't have access to WiFi and want to use 3G/4G to sync your music tracks, go to Settings > Music Quality and enable the Sync over Cellular option.
Go back to your music library (Your Music > Playlists) and select the playlist you want to sync. Toggle the Available Offline switch On (turns green when enabled).
Enable Spotify's Offline Mode
Once you have sync the desired songs with your smartphone, go to Settings > Playback and toggle the Offline Mode switch On to load your offline files. Spotify allows you to sync up to 3,333 songs per device and stay offline for a maximum of 30 days.
Disable Spotify's Offline Mode
Music streaming is disabled while the Offline Mode is in use. If you would like to stream or sync content with Spotify, turn off the Offline Mode in the app settings.